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. 2019 Jan 7;19:3. doi: 10.1186/s12880-018-0302-4

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 2 — Diagnostic confidence for chest pathologies. Bubble Chart: X-axis: Likert-score (1 = poor catheter tip visualization, 5 = excellent catheter tip visualization) of the unprocessed radiograph. Y-axis: Likert-score improvement of the catheter-enhanced radiograph; e.g. -1 = the catheter-enhanced radiograph score is one point lower than the unprocessed radiograph score. The size of each bubble indicates the number of scores. Bar Graph: Number of scores in each Likert-category; blue = unprocessed radiographs, yellow = catheter-enhanced radiographs. Radiologist 1 reports a better diagnostic confidence for chest pathologies in two catheter-enhanced radiographs. In all other cases the unprocessed radiographs were rated equal or superior to the catheter-enhanced radiographs